Objective-C Essential Training

In this course, Simon Allardice provides a nuts-and-bolts overview of Objective-C, the popular language for developing Mac, iPhone, and iPad applications, and discusses how to build a basic application using Objective-C and Xcode 4. The course shows how to download and install the development tools, covers every major feature of the language, and walks through the writing, compiling, and debugging stages of development. Programmers will also learn about memory management, a vital aspect of programming in Objective-C and the Foundation framework.

Topics include:

• Understanding the structure of an Objective-C program
• Logging messages to the command line
• Writing conditional code
• Working with variables, classes, and functions
• Creating code loops
• Using existing classes in the Foundation framework
• Managing memory usage
• Introducing Automatic Reference Counting
• Creating custom classes
• Working with arrays
• Reading and writing strings
• Understanding inheritance and NSObject
• Using Categories and Protocols
• Compiling and debugging code

Table of content

Introduction

• Welcome
• What you should know
• Using the exercise files

Getting Started

• Installing the tools
• Creating your first application
• Updates to this course

Objective-C Basics

• The Objective-C language
• The structure of an Objective-C program
• Compiling and running your code

Program Flow

• Logging messages to the command line
• Writing conditional code
• The switch statement
• Code snippets
• Operators and expressions
• Loops
• Functions

Variables

• Data types
• Working with numbers
• Working with characters
• Variable scope
• Enumerations
• Using typedef
• Preprocessor directives
• Working with strings

Classes

• Introduction to object orientation
• Using objects and pointers
• Messages and methods
• Using existing classes in the foundation framework

Memory Management

• What’s new with memory management?
• Memory management in Objective-C
• Object creation
• Using autorelease pools
• Apple autoreleased objects
• Introduction to Automatic Reference Counting (ARC)
• What ARC manages
• The rules of ARC

Custom Classes

• Creating your own classes
• Defining methods
• Defining properties
• Defining initializers
• Using dealloc

Collections

• Working with C-style arrays
• Working with Objective-C array objects
• Using dictionaries
• Fast enumeration

File Management

• Introduction to file management in Objective-C
• Working with paths and URLs
• Reading and writing strings
• Archiving objects

More Complex Classes

• Inheritance and NSObject
• Extending classes with categories
• Defining protocols
• Dynamic typing
• Debugging
• Common compile errors
• Common compile warnings
• Common run-time errors
• Exception handling with try/catch
• Breakpoints and debugging
• Upgrading code to utilize ARC

Conclusion

• Exploring and using other frameworks
• Goodbye

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